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Method, apparatus and system for portable device surface and material analysis

a portable device and surface technology, applied in the direction of instruments, measurement devices, resonant frequencies, etc., can solve the problems of affecting the functionality and analysis of portable device modules

Active Publication Date: 2018-01-30
TEXAS INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In many situations, such surfaces or materials may affect the functionality and analysis of the portable device modules, such as Haptics technology or kinesthetic communication.

Method used

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  • Method, apparatus and system for portable device surface and material analysis
  • Method, apparatus and system for portable device surface and material analysis
  • Method, apparatus and system for portable device surface and material analysis

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Embodiment Construction

[0014]Surface and material analysis is important in identifying the context and surrounding environment for a touch based user interface device (vibration mode on a solid table is significantly louder than on a couch). Identifying the context is crucial to customize touch simulation for better human machine interaction. Surface properties, such as, smoothness, friction and texture are analyzed using temporal changes in the accelerometer signal using motion against the test surface. Haptic actuation may be used against the test material. The response for the haptic actuation may be captured by means of an inbuilt (or external) accelerometer and microphone. The received signal is analyzed to identify surface characteristics.

[0015]Haptics is gaining importance in an active sensory mode. Realistic haptic actuation and its sensation vary due to a number of factors. Along with mounting and design location, one of the important factors affecting sensation is the material property of the co...

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Abstract

A method and apparatus for determining properties of at least one of a surface or materials adjacent to a portable device. The method includes windowing a segment of the received signal to remove an edge transients, computing the FFT power spectral density of the signal, determining a peak in the spectral energy at a frequency, finding local peaks by determining the difference in the signal amplitude is relation to a pre-determined threshold, and computing harmonic energy according to the local peaks and the difference and determining at least one property of the surface or material.

Description

CROSS REFERENCES TO RELATED APPLICATIONS[0001]This application claims priority from U.S. Provisional Patent Application No. 61 / 993,519 and 61 / 993,534 filed on May 15, 2014, which are hereby incorporated by reference in their entirety.BACKGROUND OF THE INVENTION[0002]Field of the Invention[0003]Embodiments of the present invention generally relate to a method, apparatus and system to determining surface and / or materials on which a portable device is situated.[0004]Description of the Related Art[0005]Determining the type of surface or materials surrounding a portable device is important. In many situations, such surfaces or materials may affect the functionality and analysis of the portable device modules, such as Haptics technology or kinesthetic communication. Haptic technology or kinesthetic communications are tactile feedback technologies which recreate the sense of touch by applying forces, vibrations, or motions to the user. This mechanical stimulation can be used to assist in t...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G01H1/00G01H3/08G01H13/00
CPCG01H3/08G01H13/00G01H1/00
Inventor SATHYANARAYANA, AMARDEEPMURTHY, NITISHRAVINDRAN, SOURABHBURK, BRIAN PAUL
Owner TEXAS INSTR INC